zài / diàn / zǐ / jì / suàn / qì / pǔ / jí / yǐ / qián / gōng / chéng / shī / cháng / yòng / jì / suàn / chǐ / jìn / xíng / jì / suàn

在电子计算器普及以前，工程师常用计算尺进行计算。

Before electronic calculators became widespread, engineers often used slide rules for calculations.